His exit comes two weeks after White House communications director Hope Hicks, also a long-serving staffer, stepped down.

January 30, 2017: Trump fired the acting attorney general, who was appointed by Obama, after she directed the Justice Department not to defend the president's first travel ban on citizens from seven Muslim-majority countries.

President Trump's personal assistant was let go on Monday - escorted from the White House without being allowed to get his coat, according to reports.

Though McEntee traveled alongside Trump, his profile was relatively low compared to other aides with similar tenure, like senior adviser Stephen Miller or the White House's director of social media Dan Scavino. The role meant McEntee was almost constantly at the President's side.

His firing marks yet another departure in an executive office marked by a revolving door of hirings and firings and plagued by issues obtaining security clearances. And it highlights the extent to which the re-election campaign has already become a landing pad for former Trump associates who have left the White House but remain loyal to the President.

"We need the help of proven leaders such as John to promote the President's growing portfolio of achievements across the country".

His swift departure comes amid a series of security clearance issues in the White House.